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15 May 2007 An alternative system for mycotoxin detection based on amorphous silicon sensors
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Abstract
In this work we investigate, for the first time, the performances of a system based on hydrogenated amorphous silicon photosensors for the detection of Ochratoxin A. The sensor is a n-type/intrinsic/p-type amorphous silicon stacked structure deposited on a glass substrate. The mycotoxin is deposited on a thin layer chromatographic plate and aligned with the sensor. An ultraviolet radiation excites the ochratoxin A, whose fluorescence produces a photocurrent in the sensor. The photocurrent value is proportional to the deposited mycotoxin quantity. An excellent linearity of the detector response over more than two orders of magnitude of ochratoxin A amount is observed. The minimum detected mycotoxin quantity is equal to 0.1ng, suggesting that the presented detection system could be a good candidate to perform rapid and analytical ochratoxin A analysis in different kind of samples.
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D. Caputo, G. de Cesare, P. De Rossi, C. Fanelli, A. Nascetti, A. Ricelli, and R. Scipinotti "An alternative system for mycotoxin detection based on amorphous silicon sensors", Proc. SPIE 6589, Smart Sensors, Actuators, and MEMS III, 65891F (15 May 2007); https://doi.org/10.1117/12.721931
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